145.6=x*(x+.12)

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Solution for 145.6=x*(x+.12) equation:


Simplifying
145.6 = x(x + 0.12)

Reorder the terms:
145.6 = x(0.12 + x)
145.6 = (0.12 * x + x * x)
145.6 = (0.12x + x2)

Solving
145.6 = 0.12x + x2

Solving for variable 'x'.

Reorder the terms:
145.6 + -0.12x + -1x2 = 0.12x + -0.12x + x2 + -1x2

Combine like terms: 0.12x + -0.12x = 0.00
145.6 + -0.12x + -1x2 = 0.00 + x2 + -1x2
145.6 + -0.12x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
145.6 + -0.12x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-145.6 + 0.12x + x2 = 0

Move the constant term to the right:

Add '145.6' to each side of the equation.
-145.6 + 0.12x + 145.6 + x2 = 0 + 145.6

Reorder the terms:
-145.6 + 145.6 + 0.12x + x2 = 0 + 145.6

Combine like terms: -145.6 + 145.6 = 0.0
0.0 + 0.12x + x2 = 0 + 145.6
0.12x + x2 = 0 + 145.6

Combine like terms: 0 + 145.6 = 145.6
0.12x + x2 = 145.6

The x term is 0.12x.  Take half its coefficient (0.06).
Square it (0.0036) and add it to both sides.

Add '0.0036' to each side of the equation.
0.12x + 0.0036 + x2 = 145.6 + 0.0036

Reorder the terms:
0.0036 + 0.12x + x2 = 145.6 + 0.0036

Combine like terms: 145.6 + 0.0036 = 145.6036
0.0036 + 0.12x + x2 = 145.6036

Factor a perfect square on the left side:
(x + 0.06)(x + 0.06) = 145.6036

Calculate the square root of the right side: 12.066631676

Break this problem into two subproblems by setting 
(x + 0.06) equal to 12.066631676 and -12.066631676.

Subproblem 1

x + 0.06 = 12.066631676 Simplifying x + 0.06 = 12.066631676 Reorder the terms: 0.06 + x = 12.066631676 Solving 0.06 + x = 12.066631676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.06' to each side of the equation. 0.06 + -0.06 + x = 12.066631676 + -0.06 Combine like terms: 0.06 + -0.06 = 0.00 0.00 + x = 12.066631676 + -0.06 x = 12.066631676 + -0.06 Combine like terms: 12.066631676 + -0.06 = 12.006631676 x = 12.006631676 Simplifying x = 12.006631676

Subproblem 2

x + 0.06 = -12.066631676 Simplifying x + 0.06 = -12.066631676 Reorder the terms: 0.06 + x = -12.066631676 Solving 0.06 + x = -12.066631676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.06' to each side of the equation. 0.06 + -0.06 + x = -12.066631676 + -0.06 Combine like terms: 0.06 + -0.06 = 0.00 0.00 + x = -12.066631676 + -0.06 x = -12.066631676 + -0.06 Combine like terms: -12.066631676 + -0.06 = -12.126631676 x = -12.126631676 Simplifying x = -12.126631676

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.006631676, -12.126631676}

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